Corner bathtub



FIG. 1 is a top perspective view of a corner bathtub showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view of the corner bathtub looking from bottom-to-top in FIG. 2;

FIG. 4 is a side elevational view of the corner bathtub looking from left-to-right in FIG. 2;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a side elevational view of the corner bathtub looking from bottom-to-top in FIG. 5; and,

FIG. 7 is a side elevational view of the corner bathtub looking from right-to-left in FIG. 5. 

The ornamental design for a corner bathtub, as shown and described. 